"Please know that today’s incident was not connected to any school threat," Principal Angela Chomokos wrote.

A Scottsdale Police Department school-resource officer arrested an 18-year-old student Thursday after being alerted the teen had a handgun in his vehicle parked at Chaparral High School, officials confirmed.

"At this point, we have no reports of any threats or intended violence," Principal Angela Chomokos wrote in a midday letter to parents. "I cannot provide any further information, as a police investigation is underway. However, it is a priority to communicate with our learning community and share as much information as we can in a timely manner."

The student, identified as Justin Perotti, was arrested on suspicion of one count of carrying a weapon on school grounds. Police said he was cooperating with law enforcement.

"This investigation is ongoing, but at this point, there is nothing to indicate that there was any specific or directed threat to any students or school staff," police said.

Additional details were not immediately available.

The incident came on the heels of Wednesday's mass shooting in Florida that left 17 dead, more than a dozen injured and the country reeling, once again, about gun violence in schools. The shooter triggered a fire alarm in a building that normally serves freshman students, then roamed the schools' corridors — from the first floor to the third — opening fire on students pouring into hallways.